Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A display device with a touch detection function, comprising: a display area including a plurality of pixels arranged in a matrix on a substrate; a plurality of drive electrodes disposed to face at least one of the pixels; a display function layer that has an image display function to display an image in the display area; touch wiring that is routed in a frame area located outside the display area and supplies an alternating current touch drive signal to the drive electrodes; display wiring that supplies a display drive voltage; and a plurality of switches conducting between at least one of the drive electrodes and the touch wiring in a touch detection period, and conducting between at least one of the drive electrodes and the display wiring in a display period, wherein the display wiring is disposed closer to the display area than the touch wiring.
A display device with integrated touch detection capabilities addresses the challenge of combining high-resolution display functionality with accurate touch sensing in a compact form factor. The device includes a display area with pixels arranged in a matrix on a substrate, where each pixel is driven by a display function layer to produce images. To enable touch detection, multiple drive electrodes are positioned to face at least one of the pixels, allowing for capacitive sensing of touch inputs. The device operates in two distinct modes: a touch detection period and a display period. During touch detection, switches connect the drive electrodes to touch wiring routed in a frame area outside the display, supplying an alternating current (AC) touch drive signal to the electrodes. In display mode, the same switches reconnect the electrodes to display wiring, which provides the necessary display drive voltage. The display wiring is positioned closer to the display area than the touch wiring to optimize signal integrity and reduce interference. This dual-function design ensures efficient use of space while maintaining both high-quality display performance and reliable touch sensing. The system avoids the need for separate touch panels, reducing thickness and cost while improving responsiveness.
2. The display device with a touch detection function according to claim 1 , further comprising a first gate driver, a second gate driver, and a plurality of scan lines, wherein the first and second gate drivers are disposed with the scan lines interposed therebetween in an extending direction of the scan lines, wherein the touch wiring includes first touch wiring on a first gate driver side and second touch wiring on a second gate driver side, wherein the plurality of switches include a plurality of switches on the first gate driver side and a plurality of switches on the second gate driver side, wherein the scan lines include a plurality of first scan lines that intersect with the first touch wiring in a grade separation manner and a plurality of second scan lines that intersect with the second touch wiring in a grade separation manner, and wherein the switches on the first driver side are each arranged in an area between adjacent first scan lines in the plurality of first scan lines, and the switches on the second driver side are each arranged in an area between adjacent second scan lines in the plurality of second scan lines.
A display device with integrated touch detection functionality includes a first gate driver, a second gate driver, and multiple scan lines positioned between the two drivers. The touch detection system comprises touch wiring divided into first touch wiring on the first gate driver side and second touch wiring on the second gate driver side. The device also includes multiple switches, with a subset positioned on the first gate driver side and another subset on the second gate driver side. The scan lines are divided into first scan lines that intersect with the first touch wiring in a grade-separated manner and second scan lines that intersect with the second touch wiring in a similar grade-separated manner. The switches on the first gate driver side are arranged between adjacent first scan lines, while the switches on the second gate driver side are positioned between adjacent second scan lines. This configuration ensures that the touch wiring and scan lines do not physically intersect, preventing electrical interference while maintaining touch detection accuracy and display functionality. The arrangement optimizes space utilization and signal integrity in the display panel.
3. The display device with a touch detection function according to claim 2 , wherein a distance between the adjacent first scan lines and a distance between the adjacent second scan lines are each larger than a distance between adjacent scan lines in the plurality of scan lines in the display area.
A display device with a touch detection function includes a display area and a touch detection area. The display area has multiple scan lines for driving display elements, while the touch detection area has first and second scan lines for detecting touch input. The first scan lines are connected to a first scan line driver, and the second scan lines are connected to a second scan line driver. The first and second scan lines are arranged in a staggered pattern to avoid overlapping with each other. The distance between adjacent first scan lines and the distance between adjacent second scan lines are each greater than the distance between adjacent scan lines in the display area. This configuration improves touch detection accuracy by reducing interference between scan lines while maintaining display performance. The staggered arrangement ensures that the first and second scan lines do not cross, preventing signal interference and improving touch sensitivity. The increased spacing between scan lines in the touch detection area reduces crosstalk, enhancing the reliability of touch detection. The display device integrates touch detection functionality without compromising display quality, making it suitable for applications requiring both high-resolution displays and precise touch input.
4. The display device with a touch detection function according to claim 2 , wherein a distance between the scan lines intersecting with the touch wiring in a grade separation manner is a distance between adjacent scan lines of the plurality of scan lines in the display area.
A display device with integrated touch detection functionality addresses the challenge of combining display and touch sensing capabilities without compromising performance or increasing complexity. The device features a display area with multiple scan lines and touch wiring arranged in a grade-separated manner, meaning the touch wiring is physically separated from the scan lines to prevent interference. The key innovation lies in the spacing between the scan lines that intersect with the touch wiring, which is set equal to the distance between adjacent scan lines in the display area. This ensures uniform signal integrity and touch detection accuracy while maintaining optimal display performance. The grade-separated design minimizes crosstalk and signal distortion, improving touch sensitivity and display clarity. The touch wiring is routed in a way that avoids direct electrical contact with the scan lines, further enhancing reliability. This configuration is particularly useful in high-resolution displays where both touch responsiveness and visual quality are critical. The solution simplifies manufacturing by standardizing the spacing between scan lines, reducing the need for complex wiring layouts. Overall, the device achieves seamless integration of touch and display functions with improved efficiency and performance.
5. The display device with a touch detection function according to claim 2 , wherein at least two scan lines in the plurality of scan lines are arranged between adjacent switches of the plurality of switches.
A display device with a touch detection function includes a display panel having a plurality of scan lines and a plurality of switches. The switches are connected to the scan lines to control the display and touch detection functions. The device is designed to improve touch detection accuracy and reduce interference between adjacent switches. To achieve this, at least two scan lines are arranged between adjacent switches in the plurality of scan lines. This spacing helps isolate the switches, minimizing crosstalk and improving signal integrity during touch detection. The display panel may include a plurality of pixels, each connected to a scan line and a data line, with the switches selectively activating the scan lines to drive the pixels. The touch detection function may involve detecting changes in capacitance or other touch-related signals along the scan lines. By ensuring that at least two scan lines separate adjacent switches, the device reduces electrical interference and enhances the reliability of touch detection. This configuration is particularly useful in high-resolution displays where precise touch sensing is required. The display device may be used in smartphones, tablets, or other touch-sensitive electronic devices.
6. The display device with a touch detection function according to claim 1 , wherein each of the drive electrodes is provided corresponding to one or more switches of the plurality of switches, and wherein the one or more switches provided for the drive electrode select either a connection between the drive electrode and the display wiring or a connection between the drive electrode and the touch wiring in a time-division manner.
A display device with integrated touch detection functionality includes a plurality of drive electrodes arranged to facilitate both display operations and touch sensing. The device comprises a display wiring system for driving display elements and a separate touch wiring system for detecting touch inputs. Each drive electrode is associated with one or more switches that selectively connect the drive electrode to either the display wiring or the touch wiring in a time-division manner. This switching mechanism allows the drive electrodes to alternate between display driving and touch sensing functions, enabling efficient use of the same electrodes for both purposes. The switches ensure that during display operation, the drive electrodes are connected to the display wiring to control the display elements, while during touch sensing, they are connected to the touch wiring to detect touch inputs. This dual-function design reduces the need for separate touch detection electrodes, simplifying the device structure and improving manufacturing efficiency. The time-division switching ensures that display and touch functions do not interfere with each other, maintaining the accuracy of both operations. The invention is particularly useful in touchscreen displays where space and cost efficiency are critical.
7. The display device with a touch detection function according to claim 1 , wherein each of the switches is coupled to a corresponding drive electrode with a first connecting conductor and coupled to a corresponding piece of the first and second touch wiring with a second connecting conductor.
A display device with a touch detection function includes a plurality of switches, each coupled to a drive electrode via a first connecting conductor and to a corresponding piece of first or second touch wiring via a second connecting conductor. The device operates in a display mode and a touch detection mode. In the display mode, the switches connect the drive electrodes to a display signal source, allowing the display to function normally. In the touch detection mode, the switches connect the drive electrodes to the touch wiring, enabling touch detection by transmitting and receiving touch signals. The first and second touch wiring may be arranged in a grid pattern, with the first touch wiring connected to one set of drive electrodes and the second touch wiring connected to another set. The switches are controlled by a control circuit to alternate between the display and touch detection modes, ensuring seamless operation. This configuration allows the display device to integrate touch detection functionality without requiring additional layers or complex routing, improving manufacturing efficiency and reducing costs. The use of separate connecting conductors for the drive electrodes and touch wiring ensures reliable signal transmission and minimizes interference between display and touch detection operations.
8. The display device with a touch detection function according to claim 1 , wherein the switches are divided into a plurality of switch groups that are provided corresponding to the drive electrodes, and wherein each of the switch groups includes a first switch for applying a first voltage to a corresponding drive electrode in the drive electrodes and a second switch for applying a second voltage to the corresponding drive electrode.
A display device with touch detection functionality includes a plurality of drive electrodes and a switching mechanism for selectively applying different voltages to these electrodes. The switching mechanism is divided into multiple switch groups, each corresponding to one or more drive electrodes. Each switch group contains at least two switches: a first switch for applying a first voltage to the corresponding drive electrode and a second switch for applying a second voltage to the same drive electrode. This configuration allows the device to dynamically adjust the voltage applied to each drive electrode, enabling precise control over touch detection and display operations. The switching mechanism may be used to alternate between touch sensing and display driving modes, improving the accuracy and efficiency of touch detection while maintaining display performance. The device is particularly useful in capacitive touchscreens where accurate and responsive touch input is required. The switch groups ensure that each drive electrode can be independently controlled, allowing for flexible and adaptive touch detection in various operating conditions.
9. The display device with a touch detection function according to claim 1 , wherein the display wiring is provided with a direct-current voltage, and the touch wiring is provided with an alternating-current voltage.
A display device with integrated touch detection functionality addresses the challenge of combining display and touch sensing capabilities in a single device without compromising performance. The device includes a display panel with display wiring and touch wiring. The display wiring is supplied with a direct-current (DC) voltage to drive the display elements, while the touch wiring is supplied with an alternating-current (AC) voltage to detect touch inputs. This configuration allows the display and touch sensing functions to operate simultaneously without interference. The DC voltage ensures stable display operation, while the AC voltage enables accurate touch detection by modulating the touch wiring to sense changes in capacitance caused by user interaction. The separation of DC and AC signals prevents signal crosstalk, improving both display quality and touch sensitivity. This design is particularly useful in touchscreen applications where high-resolution display and responsive touch input are required. The device may also include additional features such as a protective layer over the display and touch wiring to enhance durability and reliability. The combination of DC and AC voltage supply methods optimizes the performance of both display and touch functions in a compact form factor.
10. An electronic apparatus having a display device with a touch detection function capable of detecting an externally approaching object, the display device with a touch detection function comprising: a display area including a plurality of pixels arranged in a matrix on a substrate; a plurality of drive electrodes disposed to face at least one of the pixels; a display function layer that has an image display function to display an image in the display area; touch wiring that is routed in a frame area located outside the display area and supplies an alternating current touch drive signal to the drive electrodes; display wiring that supplies a display drive voltage; and a plurality of switches conducting between at least one of the drive electrodes and the touch wiring in a touch detection period, and conducting between at least one of the drive electrodes and the display wiring in a display period, wherein the display wiring is disposed closer to the display area than the touch wiring.
This invention relates to an electronic apparatus with a touch-sensitive display device that detects approaching objects. The device includes a display area with pixels arranged in a matrix on a substrate, drive electrodes facing at least some pixels, and a display function layer for image display. The device alternates between touch detection and display modes. During touch detection, switches connect the drive electrodes to touch wiring in a frame area outside the display, supplying an alternating current touch drive signal. During display, the switches connect the drive electrodes to display wiring, supplying a display drive voltage. The display wiring is positioned closer to the display area than the touch wiring, optimizing space and signal integrity. The design ensures efficient switching between touch and display functions while maintaining image quality and touch sensitivity. The apparatus is suitable for smartphones, tablets, and other interactive displays requiring seamless touch and display integration.
11. The electronic apparatus according to claim 10 , wherein the display wiring is provided with a direct-current voltage, and the touch wiring is provided with an alternating-current voltage.
This invention relates to electronic apparatuses with integrated display and touch sensing functions, addressing the challenge of interference between display and touch sensing operations. The apparatus includes a display panel with display wiring for driving display elements and touch wiring for detecting touch inputs. The display wiring is supplied with a direct-current (DC) voltage to drive the display elements, while the touch wiring is supplied with an alternating-current (AC) voltage to detect touch inputs. The use of different voltage types for the display and touch functions reduces interference between the two systems, improving touch sensitivity and display performance. The apparatus may also include a control circuit to manage the timing and synchronization of the DC and AC signals to further minimize interference. The display wiring and touch wiring are arranged in a manner that prevents mutual interference, such as by physical separation or shielding. This design ensures reliable touch detection without degrading display quality, making it suitable for devices like smartphones, tablets, and other touchscreen-equipped electronics. The invention improves upon prior art by providing a more efficient and interference-resistant integration of display and touch sensing functions.
Unknown
March 31, 2020
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